Then why is it getting worse?
The devil has been a constant. His theory that the left is getting worse because genetic mutations are accumulating, also as he points out social welfare programs have been promoting unproductive people to outbreed those like us (generalizing). These sort of people tend to be the left.
BUT LOL I’m not here to debate scripture, I’m fine with you having that opinion. I support Christianity but I see truth in much science as well.
Institutional Leftism is due the inherent need for self-superiority of unremarkable people (Dunning-Krueger), the availability of group resources and the acquiescence of societies.
There's some truth in that statement. In this country (and the UK), you are being punished for being a member of the Middle Class. So you have a lower birth rate.
By the end of the Roman Empire, the effective fertility rate (children surviving to adulthood) was probably around 1.0–1.5, well below replacement. This helps explain why Rome became increasingly reliant on outsiders (Goths, Vandals, etc.) to fill its armies and settlements.